<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>elvue1</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    body {
      width: 100%;
      height: 100%;
    }
  </style>
</head>
<body>
<div id="mainView" style="background:red;">

</div>
</body>
</html>
